基于Fisher判别理论的尾矿库安全评价模型

结合多元统计分析中的判别分析思想,建立尾矿库安全等级评价的Fisher判别模型。以湖南某尾矿库为例,合理选取一星期内观测的44组尾矿库数据进行判别分析,其中4组为检验样本,不参与判别函数的训练。研究结果表明,安全超高与标准判别函数之间的汇聚组间绝对相关性最大;各类协方差矩阵F检验的显著性概率Sig.0.05,判别分析显著;训练样本回判的正确率高达95%,检验样本判别的正确率达到100%,判别结果与实际尾矿库的安全情况基本吻合,为尾矿库的安全评价提供了一条更加系统、精准的途径。

Safety Evaluation Model of Tailings Based on the Theory of Fisher Discriminant

Based on actual characteristics of the tailings ,a Fisher discriminant analysis model is established to evaluate the safety grade of tailings .Regarding a non-ferrous tailings in Hunan Province as the case ,44 sets of tailings data are select-ed to conduct discriminant analyses ,among which four of them are testing samples and they don ’t participate in the training process .The results prove that it has the largest absolute correlation between free height and standardized discriminant func-tion ,in other words ,the significant probability of F test Sig .<0 .05 and so the discriminant analysis is obvious ;the dis-criminant rates of training samples and testing samples reach 95% and 100% respectively ,according with the actual condi-tions ,which will provide a more systematic and precise way for safety evaluation of tailings .